Assign yourself a post on the HBO wall: We are on watch for a "Game of Thrones" Season 7 trailer.

Eagle-eyed fans spotted a couple of brief "In Production Now" teases over the weekend, one showing the Oathkeeper sword Jaime Lannister gave Brienne, and another showing Lena Headey being made up behind-the-scenes to shoot more footage as Queen Cersei.

Watchers on the Wall has been collecting fan-shot videos, one that aired March 3, and another last night after "Big Little Lies":

That's all fans have seen up to this point. The official Game of Thrones YouTube channel hasn't posted anything in a couple of months, not since the Season 1-6 marathon announcement.

"Game of Thrones" Season 7 is reportedly done filming at this point -- they started in September and were said to finish in February -- so these "in production" teases were probably taped some time ago. (The seven episodes should be in post-production right now.) Usually we'd have an official trailer by now, but since this season started later and ended later, the whole schedule has been pushed back.

We still don't even have an official premiere date ... but it's possible that will come at the same time as a trailer. It's all guesswork until a raven delivers the goods. At least we know to keep our eyes on HBO, and on Twitter feeds like the ones above, to look for more teases.

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